I took this to be a contrived example to illustrate the point. I could imagine a process that creates a big data structure (e.g. parse an xml file), pulls some

I took this to be a contrived example to illustrate the point. I could imagine a process that creates a big data structure (e.g. parse an xml file), pulls some data out, and then drops the data structure. If you want to use that data sooner, you can push the cleanup off your thread.